Stretch Pal Exercise Set

ABSTRACT

The invention comprises a versatile compact kit of cooperatively fitting components to be assembled into several geometries of devices capable of being used for the holistic flexion exercise of several muscle groups of the lower torso such as the Achilles tendon, Calf muscles, Hamstrings, Adductor and Lower Back muscles for individual users of different requirements and physical stature.

BACKGROUND OF THE INVENTION

The BACKGROUND OF THE INVENTION is based on the Field and Prior Art as follows:

1. Field of the Invention

The present invention relates to versatile and collapsible personal exercise equipment intended for the flexion of a variety of muscles in the lower torso. Each configuration is assembled from a kit of cooperating components into several geometries for the flexion exercise of muscle groups of the lower torso.

2. Discussion of Prior Art

There are a variety of muscles that need stretching exercises to avoid injury in many sports, dancing and athletic activities as well as to alleviate strain problems as part of a regimen of physical therapy. Generally athletes and dancers are trained as to proper exercises and patients in the course of physical therapy are under the supervision of appropriate medical practitioners. Too often, such exercise machines are limited in use and geometric layout or bulky and not very portable. The device described herein is a kit of cooperating components that accommodates itself to different geometrical arrangements so that one can selectively flex the Achilles tendon, Calf muscles, Hamstrings, Adductors, and/or Lower Back muscles in a variety of user positions. The exercises so performed are known to comply with the protocol for conditioning the muscles for dancing and sports or for relieving strain which generally causes discomfort in individuals.

The crowded art of exercise devices generally accomplish the same goals by various approaches that are often just subtly different. A major class includes active and passive machines which employ either motors (U.S. Pat. No. 5,421,801; Reed; Apr. 10, 1992: U.S. Pat. No. 5,460,559; Brady; Oct. 24, 1995) or weights (U.S. Pat. No. 6,702,724B2; Taylor; Mar. 9, 2004). These are often bulky, heavy and require special placement and supervision. A danger exists in these machines because of the potential overpowering of the user by the driving energy source. Another class utilizes moving exercise components (U.S. Pat. No. 5,421,801; Davies; Jun. 6, 1995: U.S. Pat. No. 6,296,594B1; Simonson; Oct. 2, 2001) and are limited in physical rearrangements. A hazard exists in these devices if a moving component slips or is maladjusted to an unacceptable limit. The simpler static devices (U.S. Pat. No. 4,573,678; Lamb; Mar. 4, 1986: U.S. Pat. No. 6,244,992B1; James; Jun. 12, 2001) are very limited to the exercises to be performed. Some of the other multiple exercise machines are divided up into stations (U.S. Pat. No. 6,228,005 & U.S. Pat. No. 6,413,198B1; Gray; May 8, 2001 &Jul. 2, 2002) and are quite bulky and complex. The within described device overcomes all the disadvantages of the prior art by providing a simple, lightweight, compact and versatile set of cooperating components which may be assembled into holistic exercise devices intended for the personal use in the consumer market and designed to safely and selectively flex the critical muscles of the entire lower torso. The exercising of each major muscle grouping is specifically targeted according to the geometry of the assembled components. The interoperability of components permits the user to expand and modify the recommended geometries to fit his/her needs and creativity. During each exercise, the amount of stretch flexion is controlled by the user's judgment and limits of his/her toleration. The degree of flexion is always under the immediate control of the user. One can maintain a static pose until the muscle set relaxes into the assumed stance, and then the user progresses simply to the next level by readjusting the exercise components.

SUMMERY OF THE INVENTION

The component parts of the invention are capable of being rearranged into different geometries to correspond to the particular muscle or muscles to be exercised. The various exercise geometries currently envisioned are the Calf and Achilles tendon geometry, Hamstring geometry and the Adductor or Lower Back geometry and these geometries are described as follows.

One of three probable geometrical arrangements of the various components is designated as the Calf and Achilles tendon geometry. In this exercise arrangement, the user balances upright with either foot or both feet in the foot cradle for a length of time as suits his condition. The foot cradle is adjustable by the user to snugly accommodate and flex the ankle. The initial ability of the user to flex his ankle varies with each user and has been shown to change as the user increases his performance. The user sets the adjustable heel angle by the adjustment means so his ankle fits down and into the foot cradle. The foot cradle position is set at an incline to the horizontal as selected by the user. As the user's level of comfort is progressively achieved, he can then select a greater incline angle and change the foot cradle angle adjustment to increase the leg flexion until he reaches his desired goal for flexion of the calf muscle. He can alternate each foot successively into the foot cradle or balance with both feet in the cradle and flex both legs simultaneously.

A second probable arrangement is the Hamstring geometry. Using this exercise geometry, pads press backwards against the knee while the foot cradle holds the ankle in a fixed position. The amount of pressure on the leg is determined by the user pulling on a lever arm which extends at an obtuse angle to the knee pad. Again, an adjustable hand grasp placement permits the progression to a larger lever torque to increase the knee pressure in opposition to the static ankle position. This may be continued to the desired level of Hamstring stretch and then the other leg may be similarly exercised. According to the electron of the user, this may be most easily done with the user sitting in a vertical position or, if he needs his back supported, the user may lie on the floor in a horizontal position. Minor modifications of the basic Hamstring geometry are possible by simple permutations of kit components which will accommodate the various positions of the user as well as his size and build.

Please note that the anatomical functions are such that all the lower torso muscles are interdependent. Hence, the above described Hamstring geometry can also be effectively used to stretch the Calf and Achilles' tendon by reducing the adjustable heel angle to a suitable angle. Though the need for versatility suggests a flexible adjustment means, such as a strap and buckle, a rigid means to maintain a optimum ankle angle is also possible

A third probable arrangement is the Adductor or Lower Back geometry. In this third geometry of the components, the user sits in a squat position with shoes on and soles and heels flat against each other, so his knees are spread apart as far as possible. This exercise geometry configuration is generally hooked under a door at one extreme of the device and the user's ankles brace the assembled components to the floor at the other extreme. The user then places two long rods at some initial distal positions on an independent stretch bar, and inserts the lower extension of these inserted rods into the crux of the knee joints. This configuration now braces the knees at “spread eagle” extremities as the user reaches forward for a hand grasp located at some selected position between the door hook and his ankles. Successive placement of the rods and hand grasp to more extreme positions permit the progressive flex exercising of the Adductor muscle.

If the knee spreader bar with the inserted rods is omitted, this same user position assures stretch exercise of the Lower Back muscles. In the lower back exercise, the user advances the hand grasp away from his body position which forces him to bend forward in increasing increments.

In all the exercises, the configuration of each geometry maintains the user's limbs in essentially the same stance within that geometry. This is a static system which is sized to the body build of the user. At all times, the user has full control of the degree of stress he is experiencing and can relieve that stress immediately by his own volition. The objective is to reach a goal of stress to the desired muscle or muscle group at a time and rate set by the tolerance of the user. Inevitably, the best determinant of the safe limit of exercise is the user's pain tolerance.

At the conclusion of the exercises, the system may be disassembled into its major components and stored in a relatively small space. The disassembled components can be easily transported. The invention is intended to be a personal exercise device with a mobility factor which is essential to our modern mobile society.

To simplify the assembly of each suggested geometry, the parts and their positions are encoded, say by distinguishing colors, though other encodings may be used.

These possible geometries and exercise positions described herein are not exclusive of many others that may be devised from the combination of parts and its uses according to the needs and creativity of the user. The use of a set of components which may be cooperatively mated to produce a flexion exercise device suited to the body build of the user as well as the targeted muscle group of the user gives this invention a synergistic result which is unique in passive flexion exercise devices. Considering the number of different geometrical configurations for targeting the different muscle groups, the redundant use of the components makes this set quite economical when compared to the accumulated price of the several exercise devices if purchased separately.

A primary object of the invention is to provide a versatile exercise device to flex exercise targeted lower torso muscles in a safe, comfortable progressive manner.

Another object of the invention is to produce a low cost, light, compact, mobile exercise device for athletes, dancers and those general consumers needing simple physical therapy muscle stretching exercises.

Another object of the invention is to provide a set of versatile interconnecting compatible components designed to permit a user to create lower torso exercise geometries uniquely suited to his/her requirements.

BRIEF DESCRIPTION OF THE DRAWINGS

Further characteristics and advantages of the assembly according to the present invention will become more apparent in the following description of several of its embodiments, given as examples and not limitative, with reference to the attached drawings to be described below.

In these descriptions, a “component” designates an entity which is a functional group and is generally an assembly of individual elements or a machined part or parts. Hence, the Foot Cradle component is comprised of an assembly of aluminum extrusion parts and functions to cradle the foot in each of the geometries that need such a foot cradle. For clarity, components are literally distinguished by using title format in the descriptive text. The “parts” of the components are described in lower case. Parts and components are the “elements” of each geometry. The “geometries” describe the major assemblies of components which are mated together to accomplish the designated muscle flexion exercise.

FIG. 1, titled “Simple Independent Components Of The STRETCH PAL Kit” shows the simpler components of the kit which are to be assembled to create each exercise geometry. Permutations of components achieve versatility within each geometrical arrangement.

FIG. 2, titled “Major Components Of Foot Cradle and Friction Pad & Extension Stand” show the more complex part's assemblies which are used in conjunction with other components to create each exercise geometry.

FIG. 3, titled “Details Of The Assembled Calf And Achilles Tendon Exercise Geometry” shows plan and elevation views of the assembled elements of the Foot Cradle component.

FIG. 4, titled “The Assembled Calf And Achilles Tendon Geometry In Use” shows the Calf and Achilles tendon geometry assembly being used.

FIG. 5, titled “The Hamstring Geometry Used In The Sitting On Floor Exercise.” shows the details of the assembled parts and one position of the user performing an exercise to flex the Hamstring.

FIG. 6 titled “Hamstring Exercise In The Horizontal Position While Lying On The Floor.” shows a second position of the user performing an exercise to flex the Hamstring.

FIG. 7, titled “The Adductor And Back Stretcher Geometries” shows the details of the geometry assemblies used for Adductor and back stretcher flexion exercises.

FIG. 8, titled “The Back Stretcher Geometry Used In A Back Stretch Exercise” shows the user performing a back flexion exercise.

FIG. 9 titled “Back Stretcher Geometry Used In Conjunction With The Adductor Geometry To Stretch The Adductor Muscle Group” shows the user performing the Adductor muscle flexion exercise with the two geometry assemblies.

For the most part in the within proposed embodiment as shown in the figures, the rigid components and its parts were constructed from light aluminum extruded as solid cylindrical rods, cylindrical tubing, “U” shaped channel and square tubular materials along with screws and rivets which all assures easy prototype construction. However, the parts as shown were not intended to be limiting but only illustrative of the functionality of the defined components which may utilize other engineering materials such as plastics, wood or steel, as dictated by practical production engineering requirements.

Each of the figures were intended to show the functionality of the interconnected components and is not intended to be detailed to the part specification; i.e.; the figures are generally simplified in respect to the actual physical embodiment currently produced. The individual figures are not to any common scale.

DETAILED DESCRIPTION OF THE CURRENT EMBODIMENT

Reference is hereafter made to the attached detailed drawing figures which illustrate and clarify the elements of the embodiment.

FIG. 1. “Simple Independent Components Of The STRETCH PAL Kit”

Each of the aforementioned exercise geometries are generally implemented from the combined assembly of the individual simple components of FIG. 1 with the major components of FIG. 2 of the STRETCH PAL kit. For sake of convenience, the diagrams are not shown to any common scale.

There are three (3) Pads 9 components include in the kit. One Pad 9 component is shown here in plan and elevation profiles. Each pad has cooperative tacking means 8 attached so it can be adhered to other components to size and adjust the particular exercise geometry to the needs of the user.

There are available two (2) Frame Pads 10 in the current embodiment of the kit. One Frame Pad 10 is shown here in plan and elevation profiles which have the same overall dimensions as the Pads 9, but have the center section removed. These Frame Pads assure that no excessive pressure is transmitted exclusively to the knee cap, but that the pressure is distributed uniformly and comfortably to the knee region.

The Knee Brace 7 component shown here in plan and elevation profiles is used in conjunction with Calf and Hamstring Geometry exercise by attaching to the Foot Cradle 20 component shown and described in FIG. 2. It is positioned on the Foot Cradle to pressure the knee transversely to the ankle and hip resulting in a flexion of said Calf and Hamstrings as shown in FIGS. 5 and 6. It has tacking means 8 to engage Pad 9 components. The attachment means of Knee Brace 7 component to Foot Cradle 20 component depends on the spring action of the knee brace extension 6 snapping over the knee brace attachment 26 on said Foot Cradle 20 component.

The Door Hook 40 component, shown in use in FIGS. 8 and 9, is used to stabilize the assembled exercise geometry by mating the main shaft up to the stop rivet 38 into the Friction Pad & Extension Stand 30 component (shown on FIG. 2) and inserting into the “L” offset hook 42 under a door.

There is a pair of Foam Bricks 15 components included in the kit. One Foam Brick 15 component shown here in plan and elevation profiles which may be used to permit a user to stand level when the particular exercise geometry assembly would have required the user to assume an uneven stance; see FIG. 4. The Foam Brick 15 component is also used to elevate the Foot Cradle 20 component above the user's knee as shown in FIG. 5. These bricks also have tacking means to attach to the Foot Cradle as shown in FIG. 5.

The Stabilizing Rod 19 component is a simple element whose primary purpose is to stabilize the exercise geometry when used in a vertical position as shown in FIGS. 3 and 4 or as a rod for a hand grasp in several of the other exercise geometries as illustrated in FIGS. 5 through 9.

As a general mating means for components in this embodiment the kit contains three (3) Lock Rod 13 components which are used as connecting pins to join components or to use as pins to hold the user's knees spread wide apart in the Adductor flexion exercise as shown in FIGS. 7 and 9. The Lock Rod 13 components are approximately the same length and sized to bridge the width of the components they pin together. Each Lock Rod 13 component has a transverse through hole on one end to accommodate the associated lock pin 39 and a stop rivet 38 on the other end to prevent the rod stock from penetrating the adjustment hole 16 in which it is placed. Each Lock Rod 13 component and the Bridge Rod 12 component is constructed from rod stock of smaller diameter than any adjustment hole 16 and has a stop rivet 38 on one extreme and a lock pin 39 through a hole on the other end. The protrusion of said stop rivet 38 over the diameter of the rod stock creates an obstruction which can not pass through any adjustment hole. When the lock pin 39 is inserted into the hole in the rod, the pin prevents the rod from falling out thereby mating components through their complementary adjustment holes.

The use of a Lock Rod 13 component implies the insertion of the lock pin 39.

The Bridge 22 component shown here in plan and elevation profiles is used in spanning between components as shown in FIGS. 5 and 6.

The short Bridge Rod 12 component is sized to pin the Bridge 22 component in spanning between components as shown in FIGS. 5 and 6, in locking telescoping components together as shown in FIG. 7 or whenever a shortened pin is useful in mating parts. It is a shortened version of the Lock Rod 13 component.

The Outer Telescoping Extending Tube 31 component and the Inner Telescoping Extending Tube 41 component are used in conjunction to extend each particular geometry in which these components are used to accommodate the degree of muscle stress desired and/or the size of the user. To accomplish this objective, said tubes are dimensioned to telescope and have a multiplicity of a regular pattern of aligning adjustment holes 16. They may also be used independently.

The Stiffener 14 component is used to achieve stability and rigidity of associated components as shown in FIG. 3. It has a multiplicity of adjustment holes 16 to assure appropriate sizing of geometries.

The Cross Brace 11 component is used to bridge between the Foot Cradle 20 component and the Knee Brace 7 component as shown in FIGS. 5 and 6. As more fully described in FIG. 5, the engagement dowel 24 locks into engagement studs 25 of the Knee Brace 7 component on one extremity of the Cross Brace 11 component and then at the other extremity an adjustment hole 16 is aligned to mate using a Lock Rod 13 component to the cradle platform 5 of the Foot Cradle 20 component.

The Short Lanyard 44 component which comprises a locking hook 45 and yard 46 is used to hold the Hamstring exercise geometry from a horizontal position to some compatible solid structure. Such arrangement is explained in the FIG. 6 discussion, though not illustrated.

The Inner Reinforcing Tube 23 component can be used to extend a geometry.

Though each component is sized to fit in its respective place when assembling into the various geometries, to facilitate assembling these aforementioned components, a color coding is utilized in the prototype embodiment herein described. The use of a color coding is not intended to be limiting.

The prototype embodiment as described herein employs aluminum extrusion of square dimensions which can be sized to telescope, “U” channels for rigidity, solid cylindrical rods and other simple structural materials to facilitate current construction thereof, and is not intended to be limiting.

FIG. 2. “Major Components Of Foot Cradle and Friction Pad & Extension Stand”

In the within described embodiment the Foot Cradle 20 component shown here in plan and elevation profiles is constructed from various extrusions of some light material such as aluminum. A matched pair of legs of rectilinear tubular material forms the cradle platform 5 onto which the foot stool 3 is mounted. Onto said cradle platform 5 is rotatably mounted the heel stool 2 which may be set at an adjustable heel angle 1 with the foot stool 3 by and adjustment means 4 to assure the user's ankle fits snugly and comfortably into said foot stool 3 and heel stool 2. In this FIG. 2 said adjustment means 4 is accomplished by a simple adjustable strap and snap buckle where strap wraps about the back of said heel stool 2 onto the complementary leg of said cradle platform 5. Said strap is restrained by a pair of strap guides 28. A heel cushion 21 is integrated into said heel stool 2 to conform to the user's heel and augment the actual ankle angle the user experiences. The Foot Cradle 20 component has a pair of knee brace attachment 26 points which engage the Knee Brace 7 component.

The Friction Pad & Extension Stand 30 component is used in conjunction with the Calf and Achilles tendon, Lower Back and Adductor exercise geometries. As shown in FIG. 2 it is an assembly of elements which may be described as a friction pad 33 attached to the base brace 32 and is intersected at a right angle by a tubular extension 34 with adjustment holes 16.

FIG. 3. “Details Of The Assembled Calf And Achilles Tendon Exercise Geometry”

The Foot Cradle 20 component is mated to the Friction Pad & Extension Stand 30 component in two places to create a rigid construction. Said Friction Pad & Extension Stand 30 component is a simple sub assembly of a friction pad 33 which is attached to a long edge of the base brace 32. The base brace 32 comprises a pair of aluminum tube extrusions attached at right angles to a base extension 34. The base brace 32 is set to the base extension 34 which has a multiplicity of adjustment holes 16 for the setting the Foot Cradle 20 component at an angle to suit the requirements of the user. That angle is set by mating said Foot Cradle 20 component though adjustment holes 16 on the upper segment of the base extension 34. To assure rigidity, the Stiffener 14 component is attached to the lower section of said base extension 34 with a Bridge Rod 12 component through mating adjustment holes 16 and then by a Lock Rod 13 component as the second mating point into said Foot Cradle 20 component.

To assure vertical stability so the geometry will not tip over when used in Calf flexion exercises, the Stabilizing Rod 19 component is inserted half-way through a pair of adjustment holes 16 at the junction of the heel stool 2 and foot stool 3 located at the lower end of the Foot Cradle 20 component. If additional support is needed, the Inner Reinforcing Tube 23 component and the Door Hook 41 component may be diametrically inserted into either of the aluminum tube extrusions in the base brace 32; this additional support is not illustrated, but if utilized, it results in horizontal support at both extremities of this geometry.

Also shown in FIG. 3 are the Inner Reinforcing Tube 23 component and the paired Inner Telescoping Extending Tube 41 component and Outer Telescoping Extending Tube 31 component. As more fully described in FIG. 4, these components may be used to extend the exercise geometry in use.

Another perspective of many of the elements defined in this figure is also shown in FIG. 4.

It is noted that there is a multiplicity of adjustment holes 16 to assure versatile settings and mating between components with the use of Lock Rod 13 and Bridge Rod 12 components. Though all components are dimensioned to fit in an obvious manner, the instructions for assembly of the various exercise geometries are supported by an encoding and assembly instructions.

FIG. 4. The Assembled Calf And Achilles Tendon Geometry In Use.

In the Calf and Achilles tendon geometry, the Foot Cradle 20 and the Stiffener 14 components are mated with the Friction Pad & Extension Tube 30 component (see FIG. 3) which is further extended by the use of Inner Telescoping Extending Tube 41 component and Outer Telescoping Extending Tube 31 component (or just the Inner Telescoping Tube Extending Tube 41 component —shown in FIGS. 1 and 3 —inserted singularly into the base extension 34). To create this extension, the Inner Telescoping Extending Tube 41 component is inserted into the base extension 34 of the Friction Pad & Extension Tube 30 component and then the Outer Telescoping Extension Tube 31 component is sheathed over said Inner Telescoping Extending Tube 41 component. This connected chain of outer and inner square telescoping tubes provides an extended handle for structural strength, grasping and balance. The Foot Cradle 20 component is more fully described in FIG. 2.

The user can insert either of his feet into the Foot Cradle 20 component and balance by grasping the Outer Telescoping Extending 31 component. To further assure his proper hip alignment and stability a pair of Foam Brick 15 components is provided for the foot not engaged in the cradle.

The cradle is dimensioned to accommodate both feet so the user can therefore simultaneously flex the Calf and Achilles tendon of both legs after the user has developed a balancing confidence in this geometry.

FIG. 5. “The Hamstring Geometry Used In The Sitting On Floor Exercise.”

The Hamstring exercise geometry comprises the components of the Foot Cradle 20, Cross Brace 11, Outer Telescoping Extending Tube 31, Bridge 22, Stabilizing Rod 19, Knee Brace 7, Foam Brick 15, Pads 9 and Frame Pads 10 and then associated Lock Rods 13 and Bridge Rod 12 for mating the aforementioned components through appropriate adjustment holes to assure a proper sizing for the user and the degree of flexion desired.

By slight spreading of the knee brace extension 6 the Knee Brace 7 component is hooked in place to the knee brace attachment 26 of the Foot Cradle 20 component.

The Cross Brace 11 component is then bridged from one of the engagement studs 25 on the Knee Brace 7 component to the cradle platform 5 of the Foot Cradle 20 component. In this embodiment, this is done by inserting the engagement dowel 24 of the Cross Brace 11 component into the crux of said engagement studs 25 on the Knee Brace 7 component on one extremity and then at the other extremity aligning suitable adjustment holes 16 to the Foot Cradle 20 component and locking same with a Lock Rod 13 component. Suitable alignment holes is determined by the size of the user and the degree of pressure he/she desires to exert on the knee

Complementary tacking means 8 (say hook and eye fabric materials) holds a stack of Pad 9 components and Frame Pad 10 components to the knee platform 27 of the Knee Brace 7 component. The number of pads stacked is determined by the user and the choice of leverage on the knee desired.

If elevation of the heel is desired, a Foam Brick 15 component may be attached to the lower side of the heel stool 2 by a tacking means.

To create a rigid lever arm for the Foot Cradle 20 component, the Outer Telescoping Extending Tube 31 component must be locked to the Foot Cradle 20 component in two places. To accomplish this, adjustment holes on the distal part of the cradle platform 5 is mated with one of the adjustment holes in the Outer Telescoping Extending Tube 31 component by placing a Lock Rod 13 component through mating adjustment holes 16. To lock the lever arm, the Bridge 22 component is also attached by placing a Bridge Rod 12 component through mating adjustment holes 16 on one side of the Bridge 22 component and attaching the other side to a Lock Rod 13 which passes between mating adjustment holes 16 in the cradle platform 5 and said Bridge 22 component. This rigidizes the Outer Telescoping Extending Tube 31 component at an angle that may be determined by choice of adjustment holes 16 on the Inner Telescoping Extending Tube 31 component. The user can then insert the Stabilizing Rod 19 component half-way into one of the adjustment holes 16 on the Outer Telescoping Extending Tube 31 component as a hand grasping handle to pull the knee Brace 7 against the user's knee while the user's foot is positioned on the heel cushion 21 located on the heel stool 2. Said heel cushion 21 conforms to the contours of the user's heel to assure heel is nestled into the angle set by heel-foot adjustment means 4 for the heel position in the foot cradle. To assure a proper elevation of the user's heel above the knee, a Foam Brick 15 component is attached to the bottom of the heel stool 5 by a tacking means.

In this sitting Hamstring exercise of the Hamstring geometry assembly the Pad 9 components and Frame Pad 10 components tacked to the Knee Brace 7 component are pushing the knee of the user in opposition to the foot placed firmly in the junction of the heel stool 2 and foot stool 3 mounted on the Foot Cradle 20 component. The user grasps the Stabilizing Rod 19 component which is inserted about half-way in the Outer Telescoping Extending Tube 31 component which had been rigidly mounted on the Foot Cradle 20 component by the use of appropriate Lock Rod 13 components, Bridge 22 component and Bridge Rod 12 component placed in mating adjustment holes 16. The user may select one of several adjusting holes 16 on said Outer Telescoping Extending Tube 31 component to obtain the knee pressure desired. Elevation of the heel may be desired by the use of a Foam Brick 15 component. By choice of adjusting holes throughout the assembly, the angles of the elemental parts of the geometry may be altered to suit the needs of the user.

Though all parts are sized to fit properly, the embodiment as envisioned herein is to be color encoded to assure the appropriate assembly as per instructions. As will be shown in FIG. 6, some minor changes in the choice of adjustment holes in essentially the same assembly as depicted in this FIG. 5 can be made to size the assembly to the needs of the user and increase its versatility.

Though this geometry recommends the use of the Knee Brace and Cross Brace components, the more experienced user can still achieve the benefits of Hamstring flexion without these two components. Moreover, though this geometry was illustrated with the user sitting on the floor, Hamstring exercises can also be done by standing on one leg and elevating the Foot Cradle 20 component to the users hip level, say by using a small table. However, the standing exercise position requires that the user has a well developed sense of balance.

FIG. 6. “Hamstring Exercise In The Horizontal Position While Lying On The Floor”.

On the occasion that the user has to support his back while performing the Hamstring exercise, the Hamstring exercise geometry as shown in FIG. 6 may be employed. FIG. 6 also demonstrates the minor juxtaposition of components illustrated in FIG. 5 to accommodate the variety of needs a user may require to obtain the desired flex goal, sizing or body position. In this FIG. 6, the Outer Telescoping Extension Tube 31 component is repositioned by re-inserting the Lock Rod 13 component somewhere about half-way along said Outer Telescoping Extension Tube 31 component and into an end adjusting hole 16 on the cradle platform 5 and then rigidizing the structure with the Bridge 22 component and its Bridge Rod 12 component to the Outer Telescoping Extending Tube 31 with another Lock Rod 13 component through aligning adjusting holes 16 in both the Bridge 22 component and cradle platform 5. Essentially, this juxtaposition brings the Outer Telescoping Extending Tube 31 component from approximately parallel to the user's leg as shown on FIG. 5 to perpendicular to the user's leg as shown in this FIG. 6. The Stabilizing Rod 19 component which is used as a hand grasp in this geometry may then be inserted into said Outer Telescoping Extending Tube 31 component to bring the grasp as close to the user as needed.

If the user wishes an extended period in this horizontal position and finds his/her extended arm position to the hand grasp tiring, the Short Lanyard 44 component illustrated in FIG. 1 may be substituted for the Stabilizing Rod 19 and the associated Outer Telescoping Extending Tube 31 and Bridge 22 components. To accomplish this, the Stabilizing Rod 19 and the associated Outer Telescoping Extending Tube 31 and Bridge 22 components are removed and the yard 46 of the Short Lanyard 44 component is looped through an end adjusting hole on the extremity of the Foot Cradle 20 component in their place. The locking hook 45 may then be attached to some stable remote fixture.

FIG. 7. “The Adductor And Back Stretcher Geometries”.

The Adductor Bar geometry, detailed in the lower half of FIG. 7, is used in conjunction with the Back Stretcher geometry, detailed in the upper half of FIG. 7. The combined use of both assemblies is shown in FIG. 9. The Adductor Bar geometry is assembled by joining the Outer Telescoping Extending Tube 31 component to the Inner Telescoping Extending Tube 41 component and inserting two Lock Rods 13 components with their lock pins 39 into appropriate adjustment holes 16 as suits the user. The Bridge Rod 12 component inserted through appropriate mating holes prevents the tubes from collapsing into each other.

The Back Stretcher geometry, shown in plan profile in the upper half of FIG. 7 and elevation profile in FIG. 8, is assembled from the Friction Pad & Extension Stand 30 and the Door Hook 40 components. The Friction Pad & Extension Stand 30 component is comprised of the friction pad 33 which is attached to the base brace 32 set at right angles to the base extension 34 which is square tubular aluminum channel extrusion designed to telescope over the complementary extrusion of the hook extension 43 of the Door Hook 40 25 of 28 component. The base extension 34 which has a multiplicity of adjustment holes 16 is sheathed over the end of the Door Hook 40 component down to its stop rivet 38. The stop rivet 38 prevents the Door Hook 40 component from collapsing into the Friction Pad & Extension Stand 30 component. For additional security, a Lock Rod 13 component is also inserted through aligned adjustment holes 16 in said base extension 34 and Door Hook 40 component. A hand grasp is accommodated by the Stabilizing Rod 19 component inserted half-way into another adjustment hole 16 of said base extension 34 in said Friction Pad & Extension Stand 30 component at some selected position by the user. The Back Stretcher geometry may be used independently as shown in FIG. 8.

FIG. 8. “The Back Stretcher Geometry Used In A Back Stretch Exercise”.

The user places the Back Stretcher geometry illustrated in FIG. 7 with the “L” offset hook 42 of the Door Hook 40 component inserted under a door for stability. To flex the back muscles, the user, sitting on the friction pad 33 with shoes on and heels and soles of each foot together, pulls himself forward by grasping the Stabilizing Rod 19 component. The user can increase his back stretch by putting the Stabilizing Rod 19 component in a more distal adjustment hole 16.

FIG. 9. “Back Stretcher Geometry Used In Conjunction With The Adductor Geometry To Stretch The Adductor Muscle Group”. 26 of 28

In this exercise, the user employs the Back Stretcher geometry as shown in FIGS. 7 and 8 in conjunction with the Adductor Bar geometry as detailed in FIG. 7. The user assumes a position similar to that shown in FIGS. 8 and 9 while he has inserted the extension of the Lock Rod 13 components into the crux behind his knees. This causes the user to maintain a spread of his knees while he pulls forward on the Stabilizing Rod 19 component located in some appropriate adjustment hole 16. The user can increase the stretch by selectively extending the Long Rod 13 component positions to a more distal adjustment hole in the Adductor Bar geometry as well as moving the user's grasp on the Stabilizing Rod 19 component to a more forward position.

TABLE OF EXERCISE ASSIGNMENTS FOR STRETCH PAL KIT COMPONENT Call Out Description Of Component Exercise Geometry 7 Knee Brace Hamstring 9 Pad Hamstring 10 Frame Pad Hamstring 11 Cross Brace Hamstring 12 Bridge Rod Hamstring Adductor 13 Lock Rod All 14 Stiffener Calf & Achilles Tendon 15 Foam Brick Calf & Achilles Tendon Hamstring 19 Stabilizing Rod Calf & Achilles Tendon Hamstring Back Stretcher 20 Foot Cradle Calf & Achilles Tendon Hamstring 22 Bridge Hamstring 23 Inner Reinforcing Tube Calf & Achilles Tendon 30 Friction Pad & Calf & Achilles Tendon Extension Stand Back Stretcher 31 Outer Telescoping Calf & Achilles Tendon Extending Tube Hamstring Adductor 40 Door Hook Back Stretcher 41 Inner Telescoping Calf & Achilles Tendon Extending Tube Adductor 44 Short Lanyard Hamstring 

1. A STRETCH PAL set of cooperatively fitting components for holistic flexion exercise of several of the muscle groups of the lower torso comprising: a Foot Cradle component for holding a foot on a cradle platform and adjustably nestling an ankle and multiplicity of junction points for size adjustment and mating with other components, a Knee Brace component for transmitting forces to the knee in opposition to the foot with tacking means for holding knee pads and a multiplicity of junction points for bridging to said Foot Cradle component a Cross Brace component which acts as a bridge from said Foot Cradle to said Knee Brace components with a multiplicity of junction points for mating thereby, a multiplicity of Pad components with complementary tacking means for cushioning the knee and adjusting the sizing of the Knee Brace component to accommodate the degree of pressure applied to the knee, a Friction Pad & Extension Stand component which is a base assembly for holding components and having a multiplicity of penetrations as junction points for size adjustment and mating with other components, a Stiffener component having a multiplicity of penetrations as junction points to effect triangular rigidity to an assembly of components a paired Inner Telescoping Extending Tube component and Outer Telescoping Extending Tube component which have a sliding fit for sheathing of one to the other and each having a multiplicity of penetrations as junction points for size adjustment and mating with other components, an Inner Reinforcing Tube component which can slide into other tubes of larger cross sectional area for extending and reinforcing the larger tube, a Bridge component with a pair of junction points for interconnecting Telescoping Extending Tube components to the Foot Cradle component, a Door Hook component having a multiplicity of penetrations as junction points for size adjustment and mating with the Friction Pad & Extension Stand component to secure the combination thereof under a door, a multiplicity of Lock Rod components of diameter to fit through penetrations for sizing the component assemblies and joining together mating components, a Bridge Rod component of dimensions to sit snugly through penetrations of said Bridge for attachment to Inner Telescoping Extending Tube or Outer Telescoping Extending Tube components a pair of Foam Brick components to adjust the angular attitude of the user to the configuration of the assembled components, a Stabilizing Rod component of diameter to fit through penetrations for stabilizing the Foot Cradle component or providing a grasping handle, and a Short Lanyard component for attaching a component assembly to some secure holding point for an extended time period, whereby combinations and permutations of selectively interconnected aforementioned components may be assembled into geometries which complement flexion exercise of muscle groups of the lower torso.
 2. A Calf and Achilles Tendon Geometry of STRETCH PAL components comprising: a multiplicity of Lock Rod components for joining the several other components together, a Friction Pad & Extension Stand component having a base brace for horizontal stabilization on a floor, a vertical base extension having a multiplicity of penetrations as junction points and said base extension rising from said base brace and a flexible friction pad which extends horizontally from said base brace, a Foot Cradle component having a cradle platform with attachment penetrations and on one end of said cradle platform a foot stool and heel stool with an included adjustably angle mounting a first Lock Rod component to join said Friction Pad & Extension Stand component to said Foot Cradle component by aligning penetrations located in the distal section of said cradle platform to a penetration near the top of said base extension on said Friction Pad & Extension Stand component a Stiffener component having a multiplicity of penetrations as junction points for size adjustment and mating with other components a second Lock Rod component inserted through aligning distal penetrations on said Stiffener component and said base extension of said Friction Pad & Extension Stand component and a third Lock Rod joining aligning penetration at the other end of said Stiffener component to said Foot Cradle component thereby creating a rigid structure of said Foot Cradle component and said Friction Pad & Extension Stand component with a angular orientation of the foot stool of said Foot Cradle component according to the Calf and Achilles Tendon flexion exercise objectives of the user, and then a Stabilizing Rod component is inserted up to its half-way point through the penetrations in the cradle platform at the junction of said foot stool and heel stool on said Foot Cradle component thereby assuring a vertical stability of said Foot Cradle component and said Friction Pad & Extension Stand component, and an Inner Reinforcing Tube component is inserted into said base extension and an Outer Telescoping Extending Tube component is sheathed over said Inner Reinforcing Tube component thereby giving the user a hand grasp on said Outer Telescoping Extending Tube component so thereby a standing user may insert his/her heel into the adjustable angle between said heel and foot stool to flex the Calf and Achilles tendon muscles.
 3. A Hamstring Geometry of STRETCH PAL components comprising: a multiplicity of Lock Rod components for joining the several other components together, a Foot Cradle component with a heel stool and cradle platform having a multiplicity of penetrations and protrusions as junction points for size adjustment and mating with other components, a Knee Brace component with a knee platform having tacking means and a knee brace extension and having a multiplicity of penetrations and engagement studs as junction points for size adjustment and mating with other components, a first Lock Rod component joins together said Foot Cradle and Knee Brace components by insertion of said Lock Rod through aligning penetrations in said knee brace extension to said cradle platform thereby elevating said heel stool of said Foot Cradle component slightly above a user's knee and said knee platform located above user's knee when user leg is horizontal and user's heel is on the heel stool of said Foot Cradle component, and then onto said tacking means on said knee platform is set one or more Pad components with complementary tacking means which is stacked by the mating said complimentary tacking means on said Pad components, then said knee brace extension is rigidized by further mating with a Cross Brace component having a multiplicity of penetrations as junction points and also an engagement dowel at one extremity for engagement to said Knee Brace component a second Lock Rod component inserted through aligning penetrations in the said Cross Brace component to the said cradle platform, and a further engagement is achieved by inserting said engagement dowel into said engagement stud on the Knee Brace component whereby there is a rigid structure of said Knee Brace component to said cradle platform and said knee brace extension is approximately parallel with a user's leg when user's leg is horizontal and the user's heel is on the heel stool of said Foot Cradle component, and then an Inner Telescoping Extending Tube component having a multiplicity of penetrations as junction points is attached to the cradle platform of said Foot Cradle component by a third Lock Rod component being inserted through aligning penetrations in the upper half of said cradle platform into the midpoint of said Inner Telescoping Extending Tube component and the union of said cradle platform and said Inner Telescoping Extending Tube component is rigidized with a Bridge component having paired penetrations at its ends as junction points by a fourth Lock Rod component being inserted through aligning penetrations on end side of said Bridge component and said cradle platform and a Bridge Rod component then inserted through aligning penetrations in the other end of said Bridge component to said Inner Telescoping Extending Tube component whereby rigidizing said Inner Telescoping Extending Tube component to said cradle platform and being approximately parallel with rigidized knee brace extension, and then a Stabilizing Rod component is inserted up to its midpoint into a penetration in said Inner Telescoping Extending Tube component as a grasp for the user and a Foam Brick component attached by cooperating tacking means to the external side of said heel stool whereby by pulling on said grasp, pressure is transferred to the user's knee in opposition to the user's heel causing flexion of the Hamstring muscles while the user's leg is horizontal, say the user is sitting on the floor or is standing on one leg with said Foot Cradle component elevated on some table.
 4. A Hamstring Geometry of STRETCH PAL components comprising: a multiplicity of Lock Rod components for joining the several other components together, a Foot Cradle component with a heel stool and cradle platform having a multiplicity of penetrations and protrusions as junction points for size adjustment and mating with other components, a Foot Cradle component with a heel stool and cradle platform having a multiplicity of penetrations as junction points, a Knee Brace component with a knee platform having tacking means and a knee brace extension and having a multiplicity of penetrations and engagement studs as junction points for size adjustment and mating with other components, a first Lock Rod component joins together said Foot Cradle and Knee Brace components by insertion of said Lock Rod through aligning penetrations in said knee brace extension to said cradle platform thereby positioning said heel stool of said Foot Cradle component slightly inward forward of a user's knee and said knee platform is inward forward of user's knee when user is lying with his back on the floor and the user's leg is vertical and user's heel is on the heel stool of said Foot Cradle component, and onto the tacking means on said knee platform is set one or more Pad components with complementary tacking means which is stacked by mating said complimentary tacking means on said Pad components, then said knee brace extension is rigidized by further mating with a Cross Brace component having a multiplicity of penetrations as junction points and also an engagement dowel at one extremity for engagement to said Knee Brace component a second Lock Rod component inserted through aligning penetrations in the said Cross Brace component to the said cradle platform, and a further engagement is achieved by inserting said engagement dowel into said engagement stud on the Knee Brace component whereby there is a rigid structure of said Knee Brace component to said cradle platform and said knee brace extension is approximately parallel with a user's leg when the user is lying horizontal with leg vertical and the user's heel is on the heel stool of said Foot Cradle component, and then an Inner Telescoping Extending Tube component having a multiplicity of penetrations as junction points is attached to the cradle platform of said Foot Cradle component by a third Lock Rod component being inserted through aligning penetrations near the free end of said cradle platform into the midpoint of said Inner Telescoping Extending Tube component and the union of said cradle platform and said Inner Telescoping Extending Tube component is rigidized with a Bridge component having paired penetrations at its ends as junction points by a fourth Lock Rod component being inserted through aligning penetrations on end side of said Bridge component and said cradle platform and a Bridge Rod component then inserted through aligning penetrations in the other end of said Bridge component to said Inner Telescoping Extending Tube component whereby rigidizing said Inner Telescoping Extending Tube component to said cradle platform and being approximately perpendicular to rigidized knee brace extension, and then a Stabilizing Rod component is inserted up to its midpoint into a penetration in said Inner Telescoping Extending Tube component as a grasp for the user whereby by pulling on said grasp, pressure is transferred to the user's knee in opposition to the user's heel causing flexion of the Hamstring muscles while the user's leg is vertical, say the user is lying with his/her back on the floor.
 5. A Back Stretcher Geometry of STRETCH PAL components comprising: a Friction Pad & Extension Stand component and a flexible friction pad extended horizontally in one direction and a base extension having a multiplicity of penetrations extending horizontally in the opposite direction lying on the floor adjacent and perpendicular to a doorway with a closed door and a Stabilizing Rod component inserted up to its midpoint into a penetration in said base extension of said Friction Pad & Extension Stand component as a grasp where said penetration is located as to within reach of a user sitting on the friction pad of said Friction Pad & Extension Stand component in a squatting “spread-eagle” position with shoes on and feet touching and aligned with each other, and a Door Hook component terminated with a “L” offset hook which is inserted into said base extension at one end and said “L” offset hook of said Door Hook component is secured under the door whereby a user sitting on said friction pad has to lean radically forward with arms outstretched to grasp said Stabilizing Rod component and thereby flex his back muscles.
 6. An Adductor Geometry of STRETCH PAL components comprising: a multiplicity of Lock Rod components an Inner Telescoping Extending Tube component having a multiplicity of penetrations an Outer Telescoping Extending Tube component having a multiplicity of penetrations and sheathed over and joined by a first Lock Rod component locking both Inner and Outer Telescoping Extending Tube components, a pair of Lock Rod components is then inserted into joined Inner and Outer Telescoping Extending Tube components whereby each of said paired Lock Rod component is about equidistant from said first Lock Rod component so that the lower extending rod sections of said pair of Lock Rod components may be inserted into the crux of the knee joint of a user who is sitting in an “spread-eagle” exercise position utilizing said Back Stretcher Geometry thereby flexing his Adductor muscle group as well as flexing his back muscles.
 7. The STRETCH PAL set as in any one of the claims 1, 2, 3 and 4 wherein said Foot Cradle component further comprises: a foot stool which is a rectangular parallelepiped of a length and width to accommodate feet of large men and thickness to support said large man, a heel stool pivotally attached to the width of said foot stool and rotateably set at an angle to said foot stool by a heel-foot adjustment means, where said heel stool and foot stool subassembly forms a cradle for the foot for nestling the ankle into said heel stool and said cradle is mounted to a cradle platform formed from a pair of long square tubular structures, said tubular structures being about two and one third (2 ⅓) the length of said foot stool and said cradle platform having a multiplicity of paired aligning round penetrations through said tubular structures and at approximately the midpoint of the mounted foot stool is set a pair of joining means for a knee brace attachment whereby said Foot Cradle component can hold a user's foot in a set position relative to other attached components.
 8. The STRETCH PAL set as in any one of the claims 1, 3 and 4 whereby said Knee Brace component further comprises: a knee brace extension formed from a pair of channel angles about the length of a man's leg from ankle to the top of the knee, a knee platform having tacking means is formed from a rectangular block of about the width of a leg at the knee joint and about 2 ½ times the length of the knee cap and thickness is set into the channels of said knee brace extension at one end and at the open end of said knee brace extension is a multiplicity of paired penetrations for joining and a multiplicity of engagement means of studs is placed about half-way of said knee platform which has been set into said brace extension whereby said knee brace extension can be snap attached and bridged to said Foot Cradle component and said Pad components can be stacked and tacked onto said knee platform to apply pressure to a user's knee.
 9. The STRETCH PAL set as in any one of the claims 1, 3 and 4 whereby said Cross Brace component further comprises: a pair of rectangular tubes about the length of a man's leg from ankle to the bottom of the knee and having a multiplicity of paired penetrations for joining to said Foot Cradle component at one extreme end and a pair of stiffening dowels having a length of about the width of said Foot Cradle component which are set about halfway from the center to the ends to join said pair of rectangular tubes and an engagement dowel of about 1 ¼ the width of said Foot Cradle component which is set at the other end of said joined pair of rectangular tubes distal to said multiplicity of paired penetrations whereby said Cross Brace component joins to the engagement studs of said Knee Brace component.
 10. The “STRETCH PAL” set as in any one of the claims 1, 2 and 5 wherein said Friction Pad & Extension Stand component further comprises: a base brace of a pair of square tubular structures rigidly set at right angles sandwiching a base extension of square tubular structure with length about two-thirds (⅔) the length of said Foot Cradle component and a multiplicity of penetrations as junction points and a friction pad of a long flexible cushion pad of a length about equal to the length of a man's leg and attached to one edge of one of the said short square tubular structures of said base brace whereby said base brace has an adequate length/width footprint so as to support said base extension and said friction pad is long enough to accommodate a man's outstretched leg from a squat sitting position.
 11. The “STRETCH PAL” set as in any one of the claims 1, 2, 3 and 4 wherein said pair of Inner and Outer Telescoping Extending Tubes component further comprises: a first square tubular structure of length about equal to said cradle platform of said Foot Cradle component with a multiplicity of penetrations as junction points and a second square tubular structure with a multiplicity of penetrations as junction points and of the same length of said first square tubular structure but of smaller cross section which can telescope into said first square tubular structure, whereby said first square tubular structure designated as the Inner Telescoping Extending Tube component can sheath as a close sliding fit into said second square tubular structure designated as the Outer Telescoping Extending Tube component.
 12. The “STRETCH PAL” set as in any one of the claims 1 and 2 wherein said Inner Reinforcing Tube component further comprises: a square tubular structure of same dimensions of said Inner Telescoping Extending Tubes component whereby said Inner Reinforcing Tube component can slide into the square tubular structures of the various components.
 13. The “STRETCH PAL” set as in any one of the claims 1, 2 and 3 wherein said Pad component further comprises: a square flexible cushion pad of edge dimensions approximately equal to the width and length of said knee platform and having cooperating tacking means on complementary sides of said square flexible cushion pad whereby said Pad components may be stacked and tacked onto said Knee Brace component according to the requirements of the user.
 14. The Pad component set out in claim 13 wherein said Pad component further comprises: a square flexible cushion pad of edge dimensions approximately equal to the width of said knee platform and having cooperating tack means on one side and has its center section of about the size of a user's knee cap removed whereby said Pad is designated as a Frame Pad and constitutes a frame to accommodate the periphery of the knee of a user and avoiding direct pressure to the knee.
 15. The “STRETCH PAL” set as in any one of the claims 1, 3 and 4 wherein said Bridge component further comprises: a short square tubular structure of length approximately equal to the diagonal of said short square tubular structure and a pair of rigid channel structures with two complementary pairs of penetrations for joining to other components and of length about equal to three (3) times the length of said short square tubular structure and said pair of rigid channel structures are attached on complementary sides of said short square tubular structure which is sandwiched centrally whereby said Bridge component has a “H” shape and may be joined to other complementary components.
 16. The “STRETCH PAL” set as in claims 1 or 5 wherein said Door Hook component further comprises: a square tubular structure of cross section to constitute a sliding fit into said base extension of said Friction Pad & Extension Stand component and having a length of about two-thirds (⅔) the length of said Foot Cradle component and also having a stop protrusion about one-fifth (⅕) of its length and at the end distal to said a square tubular structure is a “L” shaped hook whereby said Door Hook component may be slid into said base extension of said Friction Pad & Extension Stand down to said stop and the said “L” hook may be secured under a door.
 17. The “STRETCH PAL” set as in any one of the claims 1, 2, 3, 4 and 6 wherein said Lock Rod components further comprises: a rod stock of diameter which snugly pass through said round penetrations and of adequate length to penetrate beyond said aligning pairs of round penetrations in the various components a stop rivet set transversely through one end of said rod stock so extending the diameter of said rod stock to exceed the diameter of said round penetrations and a transverse through hole in the other end a lock pin of spring steel of a “R” shape which can be inserted through said transverse through hole whereby said Lock Rod component can be inserted through said round penetrations to pin components together or adjust the configuration of components.
 18. The “STRETCH PAL” set as in claims 1 or 3 wherein said Foam Brick component further comprises: a rectangular parallelepiped brick of relatively solid material of about the dimensions of a large man's foot with a tacking means on one of the larger area cross sections whereby a person may stand on said Foam Brick component or attach same to another complementary tacking means on a component.
 19. The “STRETCH PAL” set as in any one of the claims 1, 2, 3, 4, and 5 wherein said Stabilizing Rod component further comprises: a rod stock of diameter which snugly pass through said round penetrations and of length approximately equal to said Foot Cradle component whereby said Stabilizing Rod can be inserted through said penetrations to contribute vertical stability or be used as a hand grasp in several of the configurations.
 20. The “STRETCH PAL” set as in claim 1 wherein said Short Lanyard component further comprises: a locking hook and a yard of an approximate length of said Foot Cradle component which is attached to said locking hook whereby said yard can be looped through said round penetration in a component and said locking hook made secure to some stable household structure.
 21. The “STRETCH PAL” set as in claims 1 or 2 wherein said Stiffener component further comprises: a long square tubular structure being approximately the length of said Foot Cradle component and having a multiplicity of penetrations as junction points whereby said Stiffener component may be used to bridge to other components to rigidizes an exercise geometry. 